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Domestic energy supplier performance data

15 December 2023

Energy supplier rating

In December 2016 we launched our quarterly energy supplier rating, which incorporates complaints handling data alongside other performance measures.
We also publish a record of data from previous releases of the rating [Excel 0.6 mb]. Please note that the methodology for the rating was changed from Q3 2020 onwards. 

Complaints data

Between 2012 and 2016, Citizens Advice (and its predecessor consumer body, Consumer Futures) published a quarterly complaints handling league table [ 430 kb] which compared how domestic energy suppliers rank on handling complaints from best to worst.
The complaints handling league table has now been replaced by our energy supplier rating. We keep a record of data from the complaints league table, and update it with quarterly complaints handling data from the star rating.